Wavelength-converting component, projection apparatus and manufacturing method of the wavelength-converting component

A projection apparatus, comprising:

• an illumination system, configured to provide an illumination beam, wherein the illumination system comprises:
• an excitation light source, configured to provide an excitation beam;
• and
• a wavelength-converting component, disposed on a transmission path of the excitation beam, wherein the wavelength-converting component is configured to convert the excitation beam into a converted beam, the illumination beam comprises the converted beam, and the wavelength-converting component comprises:
• a substrate;
• a wavelength-converting layer, disposed on the substrate;
• and
• a reflective layer, disposed between the substrate and the wavelength-converting layer, wherein the reflective layer comprises a plurality of diffuse reflection particles and a first organic adhesive, the diffuse reflection particles are mixed in the first organic adhesive, and the first organic adhesive comprises an aromatic polyimide;
• a light valve, disposed on a transmission path of the illumination beam to convert the illumination beam into an image beam;
• and
• a projection lens, disposed on a transmission path of the image beam.